1.B.4.1.1Fusion porin protein of 1115 aas with two domains that are homologous to members of family 1.B.4 at the N- and C-termini of this protein and a central domain homologous to members of family 1.B.13 proteins. These fusion proteins are found in several closely related species of α-proteobacteria such as those in the genuses, Methylosinus and Methylocystis (BL Reddy and MH Saier, unpublished observations).